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patches/gcc/4.3.3/110-trampolinewarn.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun Jan 17 23:06:02 2010 +0100 (2010-01-17)
changeset 1740 c57458bb354d
permissions -rw-r--r--
configure: do not require hg when configuring in an hg clone

When configuring in an hg clone, we need hg to compute the version string.
It can happen that users do not have Mercurial (eg. if they got a snapshot
rather that they did a full clone). In this case, we can still run, of
course, so simply fill the version string with a sufficiently explicit
value, that does not require hg. The date is a good candidate. 
     1 Original patch from: ../4.3.2/110-trampolinewarn.patch

     2 

     3 -= BEGIN original header =-

     4 Original patch from gentoo: gentoo/src/patchsets/gcc/4.3.1/gentoo/00_all_gcc-trampolinewarn.patch

     5 	This trivial patch causes gcc to emit a warning whenever

     6 	it generates a trampoline.  These are otherwise hard to

     7 	locate.  It is rigged to default ON - to have it default

     8 	to OFF remove the text 'Init(1)' from the common.opt

     9 	patch, leaving just 'Common Var(warn_trampolines)'.

    10 	Kevin F. Quinn <kevquinn@gentoo.org> 17 Jan 2006

    11 

    12 -= END original header =-

    13 

    14 diff -durN gcc-4.3.3.orig/gcc/builtins.c gcc-4.3.3/gcc/builtins.c

    15 --- gcc-4.3.3.orig/gcc/builtins.c	2008-08-19 18:37:13.000000000 +0200

    16 +++ gcc-4.3.3/gcc/builtins.c	2009-01-27 22:19:12.000000000 +0100

    17 @@ -5662,6 +5662,9 @@

    18    trampolines_created = 1;

    19    INITIALIZE_TRAMPOLINE (r_tramp, r_func, r_chain);

    20  

    21 +  if (warn_trampolines)

    22 +    warning (OPT_Wtrampolines, "generating trampoline in object (requires executable stack)");

    23 +

    24    return const0_rtx;

    25  }

    26  

    27 diff -durN gcc-4.3.3.orig/gcc/common.opt gcc-4.3.3/gcc/common.opt

    28 --- gcc-4.3.3.orig/gcc/common.opt	2008-01-22 15:11:44.000000000 +0100

    29 +++ gcc-4.3.3/gcc/common.opt	2009-01-27 22:19:12.000000000 +0100

    30 @@ -182,6 +182,10 @@

    31  Common Var(warn_system_headers) Warning

    32  Do not suppress warnings from system headers

    33  

    34 +Wtrampolines

    35 +Common Var(warn_trampolines) Init(1)

    36 +Warn whenever a trampoline is generated

    37 +

    38  Wuninitialized

    39  Common Var(warn_uninitialized) Warning

    40  Warn about uninitialized automatic variables
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